Lockwood was vice president for sales, Liu was a metallurgist and Haehnel was an engineer for Plymouth-based Metaldyne. Lockwood faces up to 33 months in prison, Liu up to 18 months and Haehnel up to 1 year. Sentencing is Jan. 15.

Haehnel's lawyer, Ed Wishnow, says the deal is fair to his client. The Associated Press also left messages Monday night for Lockwood and Liu's lawyers.